/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/**
 *@filename: function/str/load_file.c
 */

#include <server_includes.h>
#include CSTDINT_H
#include <function/str/strfunc.h>
#include <function/str/load_file.h>
#include <error.h>
#include <data_home.h>
#include <session.h>


/*
*
* We do not support this function for now...
*
*/

extern char* db_read_data_home;

String *Item_load_file::val_str(String *str)
{
  assert(fixed == 1);
  String *file_name;
  File file;
  struct stat stat_info;
  char path[FN_REFLEN];

  if (!(file_name= args[0]->val_str(str)))
    goto err;

  (void) fn_format(path, file_name->c_ptr(), db_real_data_home, "",
          MY_RELATIVE_PATH | MY_UNPACK_FILENAME);

  /* Read only allowed from within dir specified by secure_file_priv */
  if (opt_secure_file_priv &&
      strncmp(opt_secure_file_priv, path, strlen(opt_secure_file_priv)))
    goto err;

  if (stat(path, &stat_info))
    goto err;

  if (!(stat_info.st_mode & S_IROTH))
  {
     my_error(ER_TEXTFILE_NOT_READABLE, MYF(0), file_name->c_ptr());
    goto err;
  }

  if (stat_info.st_size > (long) current_session->variables.max_allowed_packet)
  {
    push_warning_printf(current_session,COLLAPSAR_ERROR::WARN_LEVEL_WARN,
                        ER_WARN_ALLOWED_PACKET_OVERFLOWED,
                        ER(ER_WARN_ALLOWED_PACKET_OVERFLOWED),
                        func_name(), current_session->variables.max_allowed_packet);
    goto err;
  }
  if (tmp_value.alloc((size_t)stat_info.st_size))
    goto err;
  if ((file = db_open_file(file_name->c_ptr(), O_RDONLY, MYF(0))) < 0)
    goto err;
  if (db_read(file, (unsigned char*) tmp_value.ptr(), (size_t)stat_info.st_size,
                    MYF(MY_NABP)))
  {
    db_close_file(file, MYF(0));
    goto err;
  }
  tmp_value.length((size_t)stat_info.st_size);
  db_close_file(file, MYF(0));

  null_value = 0;

  return(&tmp_value);

err:
  null_value = 1;
  return(0);
}


